Grab-bucket.



WQH. ROTTEN.

GRAB BUGKBT. APPLICATION FILED 2313.27, 1911.

Patenten Apr. 8,1913.

3 SHEETS-SHEET l.

W. H. BOTTLN.v

` GRAB BUCKET. APPLICATION FILED I`BB.2'7,1911.v

Patented Apr. s, 1913.

s SHEETS-snm 2.

W. H. BOTTEN. I Y

GRAB BUCKET. R APPLICATION FILED IBB.27, 1911.

v Wi'fnessels.

UNITED STATES PATENT oEEioE.

WILLIAM H. Bo'iTEN, oF CLEVELAND, lemo, Ass'iciivfoal :ifofrHE oWEN'iUCKEr COMPANY, oFcLEvELAND, oH1o,jA conronamioiv Oromo..

j GRAB-BUCKET;

T all whom #may concern.'

Be it known that I, lViLLiA-M H. BoT'iEN,... a citizen of the United States, residing at Cleveland, inthe county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Grab-Buckets, of which the following is a full, clear, and

' exact description.

This invention relates to grab orexcavating buckets, and particularly to buckets of the clam shell type operated on the block Iand falls or tackle principle. I

One of the ,objects of the invention. is to provide a bucket having verygreat digging power, which is uniform throughout thestoke of t-he bucket jaws. .Y A further object is to provide a bucket wherein the digging power maybe varied to-suit the conditions of the material in which the bucket is working, whereby the "bucket-is, enabledy to dig in hard-pan oi" clay, as satisfaetorily as in sand or other soft material. p

Still further, the invention. ims to provide a bucket having the ab 7e characteristics and which is in little danger of upsetting when lowered onto the material, and

which hangs plumb when supported by` either the opening. or closing cables.

A still further object is to' provide a bucket which is .simple in its construction, strong' and durable, and wherein there is little danger of the bights or sections of the cable becoming entangled or twisted.-

-- 'These and other objects are accomplished by my invention' which may be brieiy sum'- marized as consisting incertain-novel details of construction and combinations and constructed in accordance with my. invention, the bucket jaws being closed; Fig. 2' is a perspective view of the bucket with the i jaws open; Fig. 3is a sectional plan View with the bucket jaws open, thesectionbeing taken just above the lowerclosing block;

Fig. is a top plan 'view of a counterweight which is attached to the .bucket with the removable jackets of the counterweight in position; Fig. 5 .is `a transverse section through the counterweight substantially along the irregular line -j-rof Figa; Fig.l purposeto be explained, andat'theftop .aref-l Speciication of Letters Patenti.) `Pftiientd I Application'ledebruary 27,191.1. Serial No. 611,063.

set forth in" Apr. 8, .1913@vv 6 is a perspectiveviewof the inner or main-f portion of the counterweight which isp'ermaiientlyf,attached to the bucket-,Fig 7 is'.v a perspective view of `one of the jackets* which- `is l designed to be removably secured i portion of the counterweight to the mainv f shown in F ig. .6.

vention Vis shown, 10 and 10a represent-.the two bucket jaws, the inner upper portions Referring now to the figuresof the draw- I ing wherein thepreferred form of my iii-'- of which are pivotally connected tov a' transp-f:Y yverse shaft. 1.1, the jaws having hinging farms-12 which are secured to the jaws 'and' are connected to the shaft 11. Above the jaws is a bucket head' 13 which includes a'n opening bloclclt' having a single sheave` around .which is reeved an opening cable 15, and the head also includes a rod 16T parallel to the shaft 11" a'nd passing through the cheek plates of the blocks 14. Suitable arms 17 vconnect-the outer ends of the rod 1G with the outer corners of the bucket in the well known manner.

In ord-er that the bucket may have good jaws .80 and uniform digging power, I employ a t closing tackley consisting 'of anv upper block'.` 18 and a lower blockl'), and an adjustable I 'counteiwveightv designated as a wholeby the referencev charac-ter 2O and mounted on the- .shaft 11. yA suitable number of sheaves are employed in'ea'ch of the blocks 18 and 19', which together with the counterweight enable the bucket'to have :exceptional dig'- ,ging power., the arrangement being'siich that when the jaws are being closed, the, head-13 and parts carried'thereby will be lowered o'rpulled toward the lower block 19, insteadof the latter 4being pulled idp-- ward toward the upper bl'ock- 1S. This dig-- Vgingpower is due both to the counterweight and to multiplicity o-fsh'eaves in't'he clos-v ing tackle. .T he upper closing block` 18 is secured bythe customary shackle to the rod .lGai'rd` the lower 'closing'block 19 is perina-` nently connected tio the co'unterweight..

ioo

The counterweight QOWvfliereinthe main E features of my invention reside, includes nently attached by some means, suc-h as set screws. 20ste the shaft 11, the center. of

' a main central portionl 2Ol which is permai' gravityof the counterweight being belowfk ,the shaft. Atfthe bottom of this 'portion' 20 lof the` counterweight 'is a rib 20lj for a" weightby rmeans ofa pintle or bolt 20. which passes through the alined openings in the1flugs'20c and through suitable openings Iin the cheek plates and division plates ofl the block- 19,- thesefplates vof the block extending' doWninto the slots between the 'mannen -inclined u that its sheaves cross the sheaves of the. lower block 19. The result of. this construcfv lugs. The block 19 is therefore skewed or inclined with reference to thecount'erweight 'and theinclination is suchv that the -end sections or legs ofthe closing cable 21 which is reeved about the sheaves of the upper and 'lower blocks 18 and 19, not only have clear leads, but engage the two end sheaves of the.

lowerl block 19 in the center plane of the bucket. This is shown clearly in Fig. 3.

'Inthe present case, one of these end sections which is 'designated 21a 'extends upwardly from one of'thei end sheaves ofthe block 19 'and is secured ordead-ended on the head 13, while the other section iwhich may be designated 21b extendsupwardly through a guide 21c carried bythe head, this. part of the-cable being designed tobe connected to the hoisting mechanism-in the well known Furthermo ,-'the block 18 `-is also and' itis at van inclination such tion is that the sections or portions 21a and 21b of the closing cable and all the different bights of the cable extending between the sheaves of theupper and lower blocks have 'clear leads, and further the-bucketis supported by the cable on the center plane of the bucket, so 'that the latter will'stand i /plumb and will not be tipped or inclined "ingthe .portion 20 which is permanently' when ein ty or loaded. j

As be -ore stated, the digging power of viding an adjustable counterweight, includattached 4to the. bucket, and removable jackets 20f which are curved and rounded, and conform to the shape of the permanent portion 20a of thecounterweight, which portion is somewhat cylindrical in contour, and these jackets20f are secured to the portion 20a by through bolts 20g. jackets is'provided with anotch 20h which accommodates or receives lugs 20C on theA top ofthe counterweight member 20, The

lower portions of the jackets extend 'to the sides of the rib '20 at the bottom of'the counte'rweght member 20, but donot overlap the rib.- Therefore when the bucket is lowered, these jackets are not. hable to be injured in case the counterwelght strlkes a lprising an, upper block an {Each of the.

as clay or hard pan, the jackets 20 4will be 'addedto .the .counterweight member 20 so as to increase the weight of the lower portion of the bucket, and consequently its digging power. If, ou the other hand, the .bucket is being 'used in gravel or other soft material, less digging power is required and be removed so that it will not4 be necessary for the hoisting mechanism. to carry Vand operate an unnecessarily large dead weight.

While I have shown a counterweight provided with two sets of jackets, it will be understood, of course, that the number o'f sets of jackets may -bc greater, if necessary.

Having thus described my invention, what I claim is. l

.1. In a grab bucket a pair of pivoted bucket jaws, a bucket head to which the jaws are connected, a counterweight at the pivotal axis of the jaws, and means for opening and closing the jaws, said counterweight comprising a main portion permaf nentlyfastened in position and having the attachment to the bucket closing means.

'2l In a grab, bucket, a 4pair of pivoted bucket jaws, a head to which the jaws are connected, aFcounterweight at the pivotal' axis of the jaws, means for closing ythe jaws 'comprisin an upper block `attached to the head and a vowerblock, a counterweight comprising a'main portion permanently fastened in poslt-ion land having said lower block conthe jackets 20f or any number of vthem may "75 nected thereto, and a plurality Aof removable jackets secured t'o said main portiorron opposite sides of the connection with the lower block and extendingv substantially from one .I'ny improved' bucket may be varied to suit requirements, and this I accomplish by proend to the other-of said main portion 'of the counterweight. y

3. In a grab bucket, a pair of pivoted jaws, a bucket head to' which the jaws are connected, means .for closin the jaws coma lower block, acounterweightV atv the pivotal axis 'of the jaws, said counterweight comprising a substantially cylindrical main portion permanently fastened in position and connected at'the top to saidlower block, and a plurality of rounded jackets secured to said main portion on opposite sides of the conlnection with the lower block and each partially envelopingsaid main portion and said jackets being divided each other along the top and bottom of said main portionof the countcrweight.

4.1111 a 'grab bucket, a pair of pivoted jaws, a head to which the jaws arc conor separated from' .Said

neotecl, counterweight at' the'pivotal axis of the jaws, av tackle for closing the jaws comprising an upper: block and lower lolock,v ooimterweight comprising ax-main por* tion permanently fastened in position and having at the bottom a rib and at .the top means for forming a connection; with the lowenblock, and' a plurality of vremovable counterweight sectionssecured to lthe'opposite sides'of saidunain' portion between the ribiand the block connecting means.

5 'in a jaws havingztheir inner 'portions pivotally connected together, an upper rod, arrnsconmeeting the rod with the outer portions of the jaws, jaws at their pivotal aXls'and comprisinga main portion permanently fastened in position, andI jackets removably secured to said main,portion,.said main portion having at the rod, a mutiple grab bucket, a 4pair of Bucket.

'counterweiglit supported by .the

the top thereof a plurality of lugs arranged in aline at an angle totie'axis of the coun terweight a closing tackle comprising e multiple sheave upper block suspened from sheave-lower block' se cured to said upwardly projecting lugs of the oounterweight, and aclosli' y cable reeved about the sheaves of the tao e, the

'lowerlclosing Ablock being inclined at an angle such that the portions of the'cable lextendiifrg upwardly 'from the' two end sheaves' of the lower` block are in substan tial'ly the center plane ofthe bucket. In testimony w ereof, Ihereunboaix signature in the presence of two witnesses.

wILLiAM H. BoTTEN.

*Witnesses H. R. ULLIVAN,v A. F. Wis. 

